Improvement in furnaces for evaporating sugar-juices



' UNITE STATES PATENT OFFICE EUGENE DUGHAMP, OF ST. MARTINSVILLE, LOUISIANA.

IMPROVEMENT IN FURNACES FOR EVAPORATING SUGAR-JUICES.

Specification forming part of Letters Patent No. 26.974, dated January 31, 1860.

To all whom it 772a concern Be it known that I, EUGENE Ducnmrr, of Shh Iartinsville, in the parish of St. Martins and State of Louisiana, have invented a new and Improved Sugar-Furnace; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a plan view of the furnace and boilers arranged after the manner of my invention. Fig. 2 is a longitudinal vertical section taken through the red line 00 m of Fig. 1. Fig. 3 is a transverse vertical section taken through Fig. l, as indicated by the red line 9 7 My invention and improvement in sugar- .l'urnaces consists in a peculiar arrangement of the lines, fire-places, and pans, in combination with suitable steam-boilers, orboilerand pipes leading therefrom, whereby the wast-e heat from the battery-pan may be made to generate steam in the steam-boilers alter the water in said boilers has been brought to the boiling-point, as hereinafter described and represented.

A A A A are the outer walls of my sugarworks, and B B are walls upon which the steanrboilers rest, and G O are walls in the rear end of the furnace, which, with the end walls, A A, form a flue-space into the steamboiler furnace D, between the two interior walls, B B. On top of the walls Brest the steam-boilers E E, for generating the steam to be used about the workst'or the cane-mill, &c. These boilers are furnished with a steam-chest, E, safety-valves, &c., and all the appendages necessary for the ordinary steam-boilers. Below these boilers is the furnace l), grate-bars a, and ash-pit b.

G G G G are pipes which surround the outer walls, and whichare supported upon brackets on the inside of these walls. These pipes comnmnicate with the steam-boilers E E in front of the boilers, and are carried around the furnace-walls and connect with pipes H l-Lwhieh latter pass through the chimney-walls and communicate with the rear end of the boilers E E. Between the longitudinal pipes G G and the boilers E E and the pipes 11H are short transverse pipes L L, which are supplied with water from the boilers, and serve as supports for the pans J J, which are ar ranged upon them in the usual order, one pan boilers, another fire is built in the furnace K under the battery-pan and the first fire extinguished. Therequisitedegree ofheatisthen obtained from thelast fire, and the steam kept up in the boilers E E by means of the pipes G G G G, H H, and L L, which are heated in the following manner: The flame from the furnace passes around the battery and partly around the pipes H H, and then passes out between the walls A A and B B,where the train of evapo raters, pipes G G G G and L L, and a portion of the steam-boilers surface are all exposed and receive heat from the flame in its passage to the chimney. The pipes, therefore, keep up theheat in the boilers, and supply the necessary amount of steam, and being exposed to the flame at every point, they economize the surplus heat, which in boilers of the present construction is entirely lost. These waterpipes are all kept below the waterline in the boilers E E, so that if these boilers are kept full there will be no danger of their exploding. The flame after passing under the Coppers escapes through the fluespace and between the walls A A and G G into the stea1n-boiler furnace D, where the little heat that is left is given off to the boilers. The flue is then continued to the chimney M. The direction of the currents is indicated by black arrows.

The greatest advantage attained by my systcm is the economy of heat and of labor, at the same time the works upon my plan can be constructed much cheaper than those in the ordinary manner. I obtain from one furnace all the heat necessary to keep in operation two trains of coppers, besides the steam-boilers, and this accompanied by the particular arrangement above described, and the particu lar disposition of the pipes communicating with the boilers through the flues.

I do not lay claim to the mode of using the waste heat from the evaporating or battery pan, or pans for evaporating the irrespective of a special arrangement; but

it finally escapes up through the chimney M,

sugar-juice as indicatedby the direction of I the arrows.

This I claim-in combination with the pipes G,

WVhatIdo claim, and desire to secure by Let- H, and L, arranged under and serving as supters Patent, 'is

The Within-described arrangement of horizontal steam-boilers E in rear of furnace K, sented. flue-spaces formed by Walls 13 B, whereby the flame and smoke is directed from the furnace 'K between the walls or partitions A A and B to the rear of the furnace, and thence under the steam-boilers through the furnace D, where ports for the evaporating-pans, all in the manner and for purposes described and repre EUGENE DUoHA'MP.

Vitnesses:

R. S. SPENCER, W. TUsoH. 

